Ancient Native American civilizations

What are your observations about ancient Native American civilizations from the class materials? How might your understanding of how Native Americans lived have changed from learning more about it in this class?
What is your opinion regarding the possibility of ancient transoceanic travel? Do you think that Native Americans had contact and/or trade with civilizations on other continents prior to the Vikings?
Do you believe that the Kensington Runestone is an authentic artifact from a Viking expedition in 1300’s A.D. or is it a hoax?
Do you believe that the “cocaine mummy” is proof of trans-atlantic trade by Egyptians or Africans?
In answering all these questions be sure to give the reasons for your opinions. Even if you do not have an opinion you should still analyze all possible scenarios. Also explain the likelihood of other possibilities even if you do not believe they are possible.